Solved > 1.Bitewing radiographs are especially useful in detecting caries:1675164 …

1.Bitewing radiographs are especially useful in detecting caries on which of the following tooth surfaces?

a. Mesial

b.Occlusal

c.Facial

d.Lingual

2.Each of the following statements regarding horizontal angulation is correct EXCEPT one. Which one is the

EXCEPTION?

a.Contact points should appear open or separate from each other on the radiograph.

b.The central ray should be directed parallel to the curvature of the arch.

c.Overlapped contact points result when incorrect horizontal angulation is used.

d.Horizontal angulation is the positioning of the central ray in a side-to-side plane.

3.Each of the following statements regarding vertical angulation is correct EXCEPT one. Which one is the

EXCEPTION?

a.The correct vertical angulation for bitewing radiographs is +10 degrees.

b.Vertical angulation is indicated on a dial on the side of the tube head.

c.Negative angulation directs the central ray downward toward the floor.

d.Vertical angulation is measured in degrees.

4.Which of the following statements regarding bitewing image receptor holders is NOT correct?

a.Disposable bitewing holder tabs and loops are available.

b.Two stick-on paper bite tabs may be attached to lengthen the bite tab.

c.Bitewing loop holders are limited to use with vertical bitewing radiographs.

d.Stick-on bitewing tabs are available for both film and digital sensors.

5.Which of these statements regarding the anterior bitewing exam is FALSE?

a.The longer dimension of the image receptor is usually placed vertical.

b.For ease of placement and to avoid bending, the use of a size #1 image receptor is recommended.

c.Use of a longer bite tab allows for placement of the image receptor farther lingually in the mouth.

d.Vertical angulation used for anterior bitewings is increased over that used for posterior bitewings.

6.Each of the following statements regarding preparations for bitewing exams is correct EXCEPT one. Which one is the EXCEPTION?

a.The dental x-ray machine should be turned on and the exposure setting selected prior to placing the image

receptor intraorally.

b.The radiographic procedure should be explained to the patient prior to beginning the exposures.

c.The patient’s head should be positioned with the mean tangent parallel to the floor.

d.The patient should be asked to remove eyeglasses and all intraoral appliances prior to placement of the

image receptor.

7.Which of the following statements regarding managing bitewing exposures is correct?

a.The patient should be instructed to close so that the teeth occlude normally.

b.The bite tab should be held firmly against the lingual surface of the mandibular teeth while the patient

closes.

c.The film packet should be inserted vertically into the patient’s mouth.

d.The bite tab should be held firmly to permit the film to drift bucally.

8.Which of the following is most likely to result in a retake of a bitewing radiograph?

a.The patient maintained a steady pressure on the bite tab.

b.The patient swallowed during the exposure.

c.There are no large tori or severely malpositioned teeth.

d.The top edge of the image receptor did not contact the lingual gingiva.

9.Each of the following statements regarding successful patient preparation for bitewing radiographs is correct

EXCEPT one. Which one is the EXCEPTION?

a.Position the image receptor close to the lingual surfaces of the teeth.

b.Base image receptor size on the size of the arches.

c.Check for anatomical obstructions before positioning the image receptor.

d.Caution the patient not to swallow or let the teeth separate during the exposure.

10.Which of the following statements is FALSE?

a.Malaligned teeth may necessitate the exposure of additional bitewing radiographs.

b.Bitewing radiographs are not required if a full mouth series of periapical radiographs is available.

c.When patients present with edentulous areas, bitewing radiographs may not be needed.

d.Children with mixed dentitions may not need bitewings if a visual inspection of the proximal surfaces is

possible.

 

 

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